Requires ImageMagick

convert Font.png +gravity -crop 64x64 +repage +adjoin -gravity West -background white -splice 5x0 -background black -splice 5x0 -trim +repage -chop 5x0 -gravity East -background white -splice 1x0 -background black -splice 1x0 -trim +repage -chop 1x0 Font_%d.png

convert Stroke.png +gravity -crop 64x64 +repage +adjoin -gravity West -background white -splice 5x0 -background black -splice 5x0 -trim +repage -chop 5x0 -gravity East -background white -splice 1x0 -background black -splice 1x0 -trim +repage -chop 1x0 Stroke_%d.png